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Discussion Starter #1
When I first got my 2014 Hybrid-L last summer, the A/C was pretty unforgiving. It seemed like all it did was suck up my gas mileage, it didn't blow as cold as other cars I've been in. A few months ago, when the weather started getting hot again, I found out my system was low on refrigerant, so I added more, which fixed my gas mileage woes (because the cabin cooled quicker, the A/C could run on electric mode sooner) for the time being. Now we're in the middle of a heat wave and it takes much longer for the A/C to switch to electric mode. While it is possible that I'm still low on refrigerant, as my high pressure side doesn't get above 200psi in 100°F temps, I don't want to add any more to the system without knowing exactly how much is in it.

Does the hybrid use approximately the same "normal psi" table that most cars use? Is there a way to check how much refrigerant is in the system?
 

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I am not expert but have few suggestion.I do have same model Hybrid Civic.
AC compressor run by belt, it has small electric motor at end of compressor which start working only if car is stop ( because engine is not running.).
In all other cases when engine is running, compressor run by belt.
What was happening , when you add more R134 then compressor don't need to work constantly and your gas mileage goes up.
Now outside is more hot and compressor need to work hard to keep it up and never get chance to stop so gas mileage goes more down.
Either you have leak in system or in line which reduce amount of R134 and don't provide enough cooling or some pressure switch issue.
I think 2014 H.Hybrid use same "normal psi" table .Before you add check for leak.
I don't think that "because the cabin cooled quicker, the A/C could run on electric mode sooner " is right concept.
 

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Discussion Starter #3
I've actually noticed different - the electric motor runs while the car is moving and the engine is on if the cabin is cooled enough to where the A/C doesn't need to run at full power.

What would you recommend I use to check for leaks? I know I can't use the standard PAG-based dye.
 

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I've actually noticed different - the electric motor runs while the car is moving and the engine is on if the cabin is cooled enough to where the A/C doesn't need to run at full power.

What would you recommend I use to check for leaks? I know I can't use the standard PAG-based dye.
Bring it to an ac specialist. You adding the refrigerant yourself is hurting the environment and also your ac system. You need to evacuate all the air out of it before you can add refrigerant.


Sent from my iPhone X while on the toilet.
 
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